Nut-lock



(No Model.) I 4 S. A. LESAN.

NUT LOCK.

No. 308,266. Patented Nov. 18, 1884.

by I

WITNESSES I [INVENTOR l BY I 5 ATTORNEYS.

UNITED STATES PATENT OFFICE.

SETH A. LESAN, OF- MOUNT AYR, IOWVA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 308,266, dated November18, 1884.

Application-filed April 26, 1884. (No model.)

8 To all whom it may concern.-

Be it known that I, SETH A. 'LESAN, a citizen of the United States,residing at Mount Ayr, in the county of Ringgold and State of Iowa, haveinvented certain new and useful Improvements in Nut-Locks, of which thefollowing is a description.

This invention relates to that class ofdevices used to secure nuts uponscrew-bolts; and it consists in the construction and combination of ascrew-bolt, a screw-nut, a washer, and a key, as hereinafter describedand claimed, reference being had to the accompanying drawings, in whichFigure 1 is a longitudinal section of my invention. Fig. 2 is a rearface view of the nut, and Fig. 3 is a face view of the washer.

A represents a screw-bolt, of any usual form, and provided with alongitudinal slot, m, in the threaded portion.

B is a screw-nut fitting the thread of the bolt and provided with anumber of recesses, n, any one of which may be brought to coincide withthe slot m.

G is a key fitted to slide in the slot 111, with its body buried belowthe thread. The key has a head, a, at one end and a foot, 0, at theother end, both projecting from the same side of its body. The recessesn in the nut are adapted to receive the foot e.

D is awasher a little thicker than the length of the foot 6longitudinally with the bolt, and provided with a slot, 0, through whichthefoot may pass when the washer and key are in place.

The operation is as follows: The washer is firstplaced on the bolt; thenthe key is put through the nut and its foot entered into the slot of thebolt. Now, the nut, turning between the head and foot of the key, isscrewed home against the washer. The latter being set to register itsslot with the slot in the bolt, the foot of the key is pushed therein bythe advance of the nut. Now turn the nut until one of its recesses nregisters with the key; then draw the foot of the key into said recess.Then turn the washer slot away from the key, and the nut is completelylocked, the head of the key assisting its withdrawaleither by hand or byremoving the nut. The space between the head and foot of the key isequal to the thickness of the nut or more. The recesses in the nut willusually be made opposite the corners as an external guide to theirlocation.

What I claim as myinvention, and desire to secure by Letters Patent, is-

The combination, with a longitudinallyslotted screw-bolt, of a keyfitted therein having a head at one end and a foot at the otherprojecting from one side thereof, a screw-nut fitting the bolt andprovided with recesses extending radially from the bolt-hole in one ofits faces, said recesses being adapted to receive the key-foot, and awasher slotted to permit the key-foot to pass through, as shown anddescribed.

SETH A. LESAN.

Witnesses:

DAV DUNNING, J. S. EVERETT.

